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6 Ways to Wire In Your ECU


There are many ways to wire in your ECU. In this article we will cover the six most popular options available from Haltech.

No.1 Direct Plug-in ECU

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If you are after a simple plug-and-play engine management upgrade option and your car still has its original engine and wiring in it, a Platinum Series Pro Plug-in ECU provides the easiest and quickest solution.

Haltech’s Pro Plug-in ECU offer a host features not available on the factory ECU and are ideal for cars with low to moderate track useage. Simply unplug the factory ECU, and plug the Haltech Pro Plug-in directly into the factory harness. Load your base map and you’re ready to go!

Click here for a list of all Haltech Pro Plug-in ECUs.


No.2 Universal ECU + Plug’n’Play Adaptor Harness

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If you want to step up to the Elite series ECUs and are still using the factory harness in your car, then Plug’n’Play Adaptors are your best option.

Plug’n’Play Adaptor Harness allows you to use Haltech’s universal Elite ECUs by connecting them directly to the factory harness in your car via a Plug’n’Play adaptor.  This is an ideal solution for builders and tuners who want a quick and easy install without the need to rewire.

The Plug’n’Play Adaptor Harness comes complete with an adaptor box which has factory ECU connector on one side and the Haltech mating connectors on the other. The Adaptor Harness connects the Adaptor Box to an Elite ECU on one side and your car’s factory ECU harness on the other.

Once the Haltech ECU connected, you launch the Elite Software Programmer (ESP) and load your base map from the Haltech base map library. The base map will be sufficient to get your car going and give you a great starting point for further tuning.

Click here for Elite Plug’n’Play Adaptor Harnesses.


No.3 Universal ECU + Plug and Pin

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If your car is not supported by our Plug’n’Play options and you’re using the factory engine harness you can adapt the factory connectors to fit your Haltech ECU using a Plug and Pin method.

Simply remove the factory connectors and crimp the Haltech Plug and Pin set on. You can now connect your Haltech ECU directly to your factory harness.

Click here to see all Haltech Plugs, Pins and Wiring


No.4 Universal ECU + Basic Wire-in Harness

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If you’re not using the factory harness or doing an engine swap you can use one of Haltech’s Universal Wire-In Harnesses.

The Basic Wire-in Harness is 2.5m (8.2′) long and comes with a set of ECU connectors at one end and unterminated wires (flying lead) at the other. All the wires at the unterminated end are colour coded and clearly labelled.

Connect your Haltech ECU to the terminated end and follow your wiring diagram for all the engine connections. Load your base map and you’re ready to go.

Click here to see all Universal Wire-in ECU Kits


No.5 Universal ECU + Premium Wire-in Harness

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Haltech’s Premium Wire-in Harness is 2.5m (8.2′) long and much like its Basic counterpart comes terminated at the ECU end and unterminated (flying lead) at the engine end.

It also includes a CAN connector, a fuse box/relay assembly and a fire wall grommet. All the wires at the unterminated end are colour coded and clearly labelled. Connect your Haltech ECU to the terminated end and follow your wiring diagram for all the engine connections.

Click here to see all Universal Wire-in ECU Kits


No.6 Universal ECU + Terminated Engine Harness

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If you’re doing an engine swap or building a race car with one of the engines supported by our Terminated Engine Harness range, this is by far your easiest, most time-effective wiring solution.

Each Terminated Engine Harness is made to suit a specific engine and comes terminated with ECU connectors at one end and all engine connectors at the other.  All your factory connectors are labelled, crimped and terminated at exactly the right length.

Also included is an ignition harness and all the connectors needed to get you up and running.

Click here to see all Elite Series Terminated Harnesses